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Finding the Fourth Proportional to 311,954.24, 430,106.28 and 260,345.36

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Solution

The fourth proportional to 311,954.24, 430,106.28 and 260,345.36 is: 358,950.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,954.24 : 430,106.28 = 260,345.36 : x
  2. Step 2: Convert to fraction form
    311,954.24/430,106.28 = 260,345.36/x
  3. Step 3: Cross multiply
    311,954.24x = 430,106.28 × 260,345.36
  4. Step 4: Simplify right side
    311,954.24x = 111,976,174,304.86
  5. Step 5: Solve for x
    x = 111,976,174,304.86/311,954.24
  6. Step 6: Final answer
    x = 358,950.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.